diff --git a/src/core/file_format/psf.cpp b/src/core/file_format/psf.cpp
index 047828330..e647059f0 100644
--- a/src/core/file_format/psf.cpp
+++ b/src/core/file_format/psf.cpp
@@ -36,6 +36,7 @@ bool PSF::Open(const std::filesystem::path& filepath) {
     }
 
     const u64 psfSize = file.GetSize();
+    ASSERT_MSG(psfSize != 0, "SFO file at {} is empty!", filepath.string());
     std::vector<u8> psf(psfSize);
     file.Seek(0);
     file.Read(psf);